The patch titled
Subject: mm: memcontrol: introduce CONFIG_MEMCG_LEGACY_KMEM
has been removed from the -mm tree. Its filename was
mm-memcontrol-introduce-config_memcg_legacy_kmem.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Johannes Weiner <hannes@xxxxxxxxxxx>
Subject: mm: memcontrol: introduce CONFIG_MEMCG_LEGACY_KMEM
Let the user know that CONFIG_MEMCG_KMEM does not apply to the cgroup2
interface. This also makes legacy-only code sections stand out better.
[arnd@xxxxxxxx: mm: memcontrol: only manage socket pressure for CONFIG_INET]
Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Acked-by: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/memcontrol.h | 4 ++--
init/Kconfig | 10 +++++++++-
mm/memcontrol.c | 18 +++++++++---------
mm/vmpressure.c | 2 ++
net/ipv4/Makefile | 2 +-
5 files changed, 23 insertions(+), 13 deletions(-)
diff -puN include/linux/memcontrol.h~mm-memcontrol-introduce-config_memcg_legacy_kmem include/linux/memcontrol.h
--- a/include/linux/memcontrol.h~mm-memcontrol-introduce-config_memcg_legacy_kmem
+++ a/include/linux/memcontrol.h
@@ -233,7 +233,7 @@ struct mem_cgroup {
*/
struct mem_cgroup_stat_cpu __percpu *stat;
-#if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_INET)
+#if defined(CONFIG_MEMCG_LEGACY_KMEM) && defined(CONFIG_INET)
struct cg_proto tcp_mem;
#endif
#ifndef CONFIG_SLOB
@@ -717,7 +717,7 @@ extern struct static_key_false memcg_soc
#define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key)
static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg)
{
-#ifdef CONFIG_MEMCG_KMEM
+#ifdef CONFIG_MEMCG_LEGACY_KMEM
if (memcg->tcp_mem.memory_pressure)
return true;
#endif
diff -puN init/Kconfig~mm-memcontrol-introduce-config_memcg_legacy_kmem init/Kconfig
--- a/init/Kconfig~mm-memcontrol-introduce-config_memcg_legacy_kmem
+++ a/init/Kconfig
@@ -964,10 +964,13 @@ config MEMCG_SWAP_ENABLED
For those who want to have the feature enabled by default should
select this option (if, for some reason, they need to disable it
then swapaccount=0 does the trick).
+config MEMCG_LEGACY_KMEM
+ bool
config MEMCG_KMEM
- bool "Memory Resource Controller Kernel Memory accounting"
+ bool "Legacy Memory Resource Controller Kernel Memory accounting"
depends on MEMCG
depends on SLUB || SLAB
+ select MEMCG_LEGACY_KMEM
help
The Kernel Memory extension for Memory Resource Controller can limit
the amount of memory used by kernel objects in the system. Those are
@@ -1071,6 +1074,11 @@ config CGROUP_FREEZER
Provides a way to freeze and unfreeze all tasks in a
cgroup.
+ This option affects the ORIGINAL cgroup interface. The cgroup2 memory
+ controller includes important in-kernel memory consumers per default.
+
+ If you're using cgroup2, say N.
+
config CGROUP_HUGETLB
bool "HugeTLB controller"
depends on HUGETLB_PAGE
diff -puN mm/memcontrol.c~mm-memcontrol-introduce-config_memcg_legacy_kmem mm/memcontrol.c
--- a/mm/memcontrol.c~mm-memcontrol-introduce-config_memcg_legacy_kmem
+++ a/mm/memcontrol.c
@@ -3001,7 +3001,7 @@ static void memcg_free_kmem(struct mem_c
}
#endif /* !CONFIG_SLOB */
-#ifdef CONFIG_MEMCG_KMEM
+#ifdef CONFIG_MEMCG_LEGACY_KMEM
static int memcg_update_kmem_limit(struct mem_cgroup *memcg,
unsigned long limit)
{
@@ -3025,7 +3025,7 @@ static int memcg_update_kmem_limit(struc
{
return -EINVAL;
}
-#endif /* CONFIG_MEMCG_KMEM */
+#endif /* CONFIG_MEMCG_LEGACY_KMEM */
/*
@@ -4039,7 +4039,7 @@ static struct cftype mem_cgroup_legacy_f
.seq_show = memcg_numa_stat_show,
},
#endif
-#ifdef CONFIG_MEMCG_KMEM
+#ifdef CONFIG_MEMCG_LEGACY_KMEM
{
.name = "kmem.limit_in_bytes",
.private = MEMFILE_PRIVATE(_KMEM, RES_LIMIT),
@@ -4266,13 +4266,13 @@ mem_cgroup_css_online(struct cgroup_subs
if (ret)
return ret;
-#ifdef CONFIG_MEMCG_KMEM
+#ifdef CONFIG_INET
+#ifdef CONFIG_MEMCG_LEGACY_KMEM
ret = tcp_init_cgroup(memcg);
if (ret)
return ret;
#endif
-#ifdef CONFIG_INET
if (cgroup_subsys_on_dfl(memory_cgrp_subsys) && !cgroup_memory_nosocket)
static_branch_inc(&memcg_sockets_enabled_key);
#endif
@@ -4329,7 +4329,7 @@ static void mem_cgroup_css_free(struct c
memcg_free_kmem(memcg);
-#ifdef CONFIG_MEMCG_KMEM
+#if defined(CONFIG_MEMCG_LEGACY_KMEM) && defined(CONFIG_INET)
tcp_destroy_cgroup(memcg);
#endif
@@ -5558,7 +5558,7 @@ void sock_update_memcg(struct sock *sk)
memcg = mem_cgroup_from_task(current);
if (memcg == root_mem_cgroup)
goto out;
-#ifdef CONFIG_MEMCG_KMEM
+#ifdef CONFIG_MEMCG_LEGACY_KMEM
if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && !memcg->tcp_mem.active)
goto out;
#endif
@@ -5587,7 +5587,7 @@ bool mem_cgroup_charge_skmem(struct mem_
{
gfp_t gfp_mask = GFP_KERNEL;
-#ifdef CONFIG_MEMCG_KMEM
+#ifdef CONFIG_MEMCG_LEGACY_KMEM
if (!cgroup_subsys_on_dfl(memory_cgrp_subsys)) {
struct page_counter *counter;
@@ -5619,7 +5619,7 @@ bool mem_cgroup_charge_skmem(struct mem_
*/
void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages)
{
-#ifdef CONFIG_MEMCG_KMEM
+#ifdef CONFIG_MEMCG_LEGACY_KMEM
if (!cgroup_subsys_on_dfl(memory_cgrp_subsys)) {
page_counter_uncharge(&memcg->tcp_mem.memory_allocated,
nr_pages);
diff -puN mm/vmpressure.c~mm-memcontrol-introduce-config_memcg_legacy_kmem mm/vmpressure.c
--- a/mm/vmpressure.c~mm-memcontrol-introduce-config_memcg_legacy_kmem
+++ a/mm/vmpressure.c
@@ -275,6 +275,7 @@ void vmpressure(gfp_t gfp, struct mem_cg
level = vmpressure_calc_level(scanned, reclaimed);
+#ifdef CONFIG_INET
if (level > VMPRESSURE_LOW) {
/*
* Let the socket buffer allocator know that
@@ -286,6 +287,7 @@ void vmpressure(gfp_t gfp, struct mem_cg
*/
memcg->socket_pressure = jiffies + HZ;
}
+#endif
}
}
diff -puN net/ipv4/Makefile~mm-memcontrol-introduce-config_memcg_legacy_kmem net/ipv4/Makefile
--- a/net/ipv4/Makefile~mm-memcontrol-introduce-config_memcg_legacy_kmem
+++ a/net/ipv4/Makefile
@@ -56,7 +56,7 @@ obj-$(CONFIG_TCP_CONG_SCALABLE) += tcp_s
obj-$(CONFIG_TCP_CONG_LP) += tcp_lp.o
obj-$(CONFIG_TCP_CONG_YEAH) += tcp_yeah.o
obj-$(CONFIG_TCP_CONG_ILLINOIS) += tcp_illinois.o
-obj-$(CONFIG_MEMCG_KMEM) += tcp_memcontrol.o
+obj-$(CONFIG_MEMCG_LEGACY_KMEM) += tcp_memcontrol.o
obj-$(CONFIG_NETLABEL) += cipso_ipv4.o
obj-$(CONFIG_XFRM) += xfrm4_policy.o xfrm4_state.o xfrm4_input.o \
_
Patches currently in -mm which might be from hannes@xxxxxxxxxxx are
proc-revert-proc-pid-maps-annotation.patch
mm-oom_killc-dont-skip-pf_exiting-tasks-when-searching-for-a-victim.patch
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